I just want to ask if its worth the money to have full synthetic oil such as mobil 1 on a V6, I haven't changed my oil yet, and my camaro's agency is saying that only delphi is GM certified, so by not filling my Camaro with delphi I might void the warranty!! So I just want to know if having mobil 1 worth arguing my agency abt it? FYI, I must change my Oil every 6213 miles at the agency not to void the warranty. (It just feels right to me to change the oil after 1800 miles)

Around here Mobil 1 full synthetic is pretty affordable. Synthetic is definitely recommended. Actually, the Camaro calls for 'Dexos' approved oil and Mobil 1 is 'Dexos' approved right on the front of the bottle. No worries. Heck, Mobil 1 is (or used to be) the factory oil on many or all GM vehicles.